Dunno about the sonky's. They could have been invented years previously I suppose, but without re-reading TFE I wouldn't comment.
I love love love this book, it's one of my favourites. I agree it doesn't have so many of the hilarious one-liners, but then my favourite quotes come from books that I find it hard to read now, because the stories aren't anything like as good as the recent ones.
Dr Lawn - so sarcastic, I think he's great
The Agony Aunts - I thought this was a genius idea, I wish we knew more about them. Are they retired seamstresses do you think? Or just vicious old biddies for hire?
Vetinari - seems to become a lot more human in this book, I thought the tiger book was another brilliant idea. We see that he wasn't just an assassin, he was in a league of his own. Explains a lot about his apparent near-superhuman abilities - if he can disappear, doing a crossword in minutes and resisting the effects of alcohol are mere child's play. I also loved his interplay with Downey, & how it must stick in that man's throat now to have unsuccessfully tried to bully the patrician.
I think that when "our" Sam was a boy, he was taught by Keel. Events have definitely changed - the Morphic Street conspiracy and the attack on the barricade were completely different the second time around - a slightly dodgy memory wouldn't change those things. And I think that Vetinari also had a role in the original revolution, otherwise he wouldn't have already been wearing the lilac.